Unusual features of the neck and middle-piece of snake spermatozoa.
D000818:Animals; D008297:Male; D008540:Meiosis; D008854:Microscopy, Electron; D008928:Mitochondria / Q000254:growth & development; D012911:Snakes / Q000033:anatomy & histology*; D013094:Spermatozoa / Q000166:cytology*